| // Copyright (C) 2004, 2009 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| |
| #include <cstdio> |
| #include <fstream> |
| #include <string> |
| #include <testsuite_performance.h> |
| |
| // libstdc++/15002 |
| int main() |
| { |
| using namespace std; |
| using namespace __gnu_test; |
| |
| time_counter time; |
| resource_counter resource; |
| |
| const char filename[] = "tmp_getline.txt"; |
| const unsigned lines = 1000000; |
| const unsigned line_length = 200; |
| |
| char* line = new char[line_length + 2]; |
| |
| // Construct data. |
| { |
| memset(line, 'x', line_length); |
| line[line_length] = '\n'; |
| line[line_length + 1] = '\0'; |
| |
| ofstream out(filename); |
| for (unsigned i = 0; i < lines; ++i) |
| out << line; |
| } |
| |
| // C |
| { |
| // Fill the cache. |
| FILE *file = fopen(filename, "r"); |
| while (fgets(line, line_length + 2, file)); |
| fclose(file); |
| |
| file = fopen(filename, "r"); |
| start_counters(time, resource); |
| while (fgets(line, line_length + 2, file)); |
| stop_counters(time, resource); |
| fclose(file); |
| report_performance(__FILE__, "C (fgets)", time, resource); |
| clear_counters(time, resource); |
| } |
| |
| // getline(basic_istream<_CharT, _Traits>& __in, |
| // basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim) |
| { |
| ifstream file(filename); |
| string string_line; |
| |
| start_counters(time, resource); |
| while (getline(file, string_line)); |
| stop_counters(time, resource); |
| report_performance(__FILE__, "C++ (string)", time, resource); |
| clear_counters(time, resource); |
| } |
| |
| // getline(char_type* __s, streamsize __n, char_type __delim) |
| { |
| ifstream file(filename); |
| |
| start_counters(time, resource); |
| while (file.getline(line, line_length + 2)); |
| stop_counters(time, resource); |
| report_performance(__FILE__, "C++ (char array)", time, resource); |
| clear_counters(time, resource); |
| } |
| |
| delete[] line; |
| unlink(filename); |
| return 0; |
| } |